This 12in x 17in green self-healing professional quality folding rotary mat is especially designed for use with OLFA rotary cutters. Double-sided with yellow grid lines on one side for precision cutting, solid on opposite for general cutting. Not only does this OLFA® self-healing cutting mat have a long life, it extends the life of your knife blades, too. Designed for heavy-duty cutting, the mat can be used with OLFA® utility and art knives, as well as rotary and special cutters. 3.0mm thick for a variety of applications. Store flat.